Privately Funded
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Publicly Funded
Addenda Available
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Published December 3, 2025 at 7:00 PM
Updated December 4, 2025
Site work for a power facility in Bowmanville, Ontario. Conceptual plans call for site work for a power facility.
Construction of a new transmission line between Bowmanville and the Greater Toronto Area (GTA) to meet the province's projected electricity demand over the next 25 years. The proposed project is a new double-circuit 500-kilovolt (kV) transmission line from the Bowmanville Switching Station to either the Parkway Transformer Station (TS), Claireville TS, or Cherrywood TS, including associated station facility expansions or upgrades required at terminal stations. Once complete, the line will secure Ontario's energy supply for decades to come. It is expected to deliver reliable, clean electricity from the first of four small modular reactors (SMRs), enough to power the equivalent of approx. 300,000 homes. TIMELINE: In November 2025, the province designated Hydro One to develop this new priority transmission line. The line is expected to be in service in the early-2030s. *Hydro One will build the line in partnership with proximate First Nations - First Nation 50-50 Equity Partnership Model. *Construction cost is an estimate only.
Conceptual
Power Plant
$1,200,000,000.00
Public - State/Provincial
Site Work
Plans and Specifications are not available for this project. If that changes, they will be made available here.
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